/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

//! YAML formatter

use serde::Serialize;

use super::Formatter;

pub struct YamlFormatter;

impl Formatter for YamlFormatter {
    fn format<T: Serialize>(&self, data: &T) -> String {
        serde_json::to_value(data)
            .ok()
            .and_then(|v| serde_yaml::to_string(&v).ok())
            .unwrap_or_else(|| "error: failed to format as YAML".to_string())
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_yaml_formatter() {
        let formatter = YamlFormatter;
        let data = serde_json::json!({"name": "test", "value": 123});
        let output = formatter.format(&data);
        assert!(output.contains("name:"));
        assert!(output.contains("test"));
    }
}
